论文部分内容阅读
美国农民正在改变其土壤耕作的方法.在过去的十年间,从几乎完全依靠有壁犁犁耕和每年都翻动土壤,变为采取很少扰动土壤和在地表上多留残茬的水土保持耕作措施.
American peasants are changing the way they cultivate their soil, and in the past decade it has shifted from relying almost entirely on plowed plows and turning the soil every year into measures for soil and water conservation that disturb the soil little and leave stubbles on the surface .